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@nimh tatre @nicht @ffice HENRY B. PITNEE, 0F ,LA PORTE, INDIANA.

Letters-Patent No. 72,079, dated December 10, 1,867.V A

" IMPROVEMENT IN XLE-Box.

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TO ALL WHOM IT MAY ONOERN: I, Y Be it known that I, HENRY B. PITNER, of La Porte, in the county of La Porte, and State of Indiana, have invented a new and improved Axle-Box', and I do hereby declare that the following is a full, free, and exactdescription thereof, which will enable those skilled iu the art to malte and use the same, reference being had to the accompanying drawing, forming part of this specification.

This invention relates to a new andiimproved method of constructing axle-boxe`s for carriages, whereby the same are more economically made, and the friction between the axleand the box is greatly lessened.

It consists of an iron thimble or sluice, providedon each end, in the inside, with a screw-thread, into which are tted ends of brass or composition, or other metal softer than iron, in such a way that said metallic ends will not turn in the box, and so that the axle bears only upon the softer metal.

The drawing represents a central longitudinal section of my invention. A is the thimble or sleeve. B are L the softer metallic ends. al are the shoulders on the metallic ends B. at2 are shoulders on the thimble or sleeve A. The thimble or sleeve A is made of cast or wrought iron, in the general form of axlefboxes, of sutlicient thickness for strength, and of sucient length for the axle to be used,and is chambered out on each end in the inside, so as to -form the shoulders a?, as shown in the drawing. 'Upon the inside of said chambers is cut a screw-thread, as shown. The end pieces B are made of brass or composition, or other metal softer than iron, of a shape so as when attached to the sleeve A, at each end of the same, to form a continuation of said slecveA, as shown, and may be of any convenient lengthto give the required length to the box when finished. Said end pieces B arebored out, so as to t the axle upon which they are to turn, in the usual way, the bore of the end pieces B being a little smaller than the boreof the sleeve A, as shown. At ashort distance from the ends of the said end pieces B, the same are turned down to a smaller diameter,'so' as to form the shoulder al, as shown.

Said endrpieces A are provided with a screw-thread on the outside the same, upon the smaller diameter of the same, entirely to the end of the same, "the distance from the shoulder a.1 to theinner end ofthe end pieces B beingV exactly'equal to the distance from the shoulders a2 of the sleeve A to -the ends of the same, so that the inner ends of the end pieces B will rest against the shoulders a2, and the ends of the sleeve A will rest against the shoulder al, so that the end pieces B will Vnot turn in the sleeve A when the box is in motion. The end pieces B are of suiiicient length on theinside to give a suitable bearing for the box on the axle, and the same are finished on the outside, so as to conform to the generalshape of the sleeve A, as shown in the drawing.

The operation is readily seen from the drawing, the bearings of the box on the axle being only on the inner surfaces of the end pieces B.

Constructed as above shown and described, it constitutes a cheap and'durablc axle-.box for all kinds-of ear-A riages, whereby the friet-ion between the axle and the box is greatly lessened.

I 'claim as new, and desire to secure by Letters Patent- 1. An erleben, substantially as shown and described, and for the purposes set forth.

2. The sleeve or thimble A, in combination with the end pieces B, substantially as shown and described, and for the purposes set forth. 4

3. The ishoulder a and the shoulder a2, in combination with the sleeve A and end pieces B, substantially as shown and described, and for the purposes set forth.

The above specification of my invent-ion signed by me, this 2311 day ot' October-,1867.

HENRY B. IITNER.

Witnesses:

WM. C. PIrNnn, A. D. KIMBERLII. 

